Defense and Security
35 Results were found on Technologies
Sub Category Name
Efficient information coding in living organisms
It is clear that DNA can be used as a storage medium, each nucleotide carrying two information bits, which can store vast amounts of data for very long periods of time and with high reliability; as overtime, humans remain human just as cats remain cats. However, it is also clear that it is a very […] Read More >
METHOD FOR GENERATION OF CONTROLLED THz WAVES
We present a method for the generation of THz pulses with tailored temporal shape from nonlinear metasurfaces. The method is based on single-cycle THz emission by the metasurface inclusions. We show that the spatial amplitude and phase structure of the nonlinear response is mapped to the temporal shape of pulses emitted at certain angles. We […] Read More >
Broad-Bandwidth, Long-Haul, Underwater Fiber-Optic Sensing System
An optical fiber can be described as a glass pipeline which can guide light over great distances with very little loss. In addition to being the central communication channel of the information era, it has another very interesting application. This application is called distributed sensing. By launching into the fiber specially designed pulse sequences of […] Read More >
An On-Chip Sub-THz Scalable Beam Steering Antenna Array
We present a novel way of distributing signal to an antenna array without the use of power dividers. In our proposed method, we use the leaked fundamental from a non-linear harmonic generator circuit as an input to drive the next element in the chain. As a proof of concept, we show this distribution method at […] Read More >
LWIR / FIR / THz Detectors and Sources For High Sensitivity Remote Sensing
The discoveries of novel materials and physical phenomena continuously drive technological advancements and their applications. So is the case for Terahertz (THz) optoelectronics, operating roughly in the frequency range of f≈0.5-35THz. In this spectral range radiation penetrates through opaque materials without the risk of ionization, making THz radiation highly attractive for technological applications, such as […] Read More >
Tuning Stylegan Locally to Faithfully Encode Any Input Image
The ability to distinguish between synthetic images and real ones has become increasingly challenging since the introduction of Generative Adversarial Networks (GAN). Although the images produced by this framework are often indistinguishable from real ones, one lacks the ability to control the specific outcome. Most relevant to our work is the StyleGAN family of generators, […] Read More >
Error Correction Code Transformer
Error correction code is a major part of the communication physical layer, ensuring the reliable transfer of data over noisy channels. Recently, neural decoders were shown to outperform classical decoding techniques. However, the existing neural approaches present strong overfitting due to the exponential training complexity, or a restrictive inductive bias due to reliance on Belief […] Read More >
Cost-Effective Distributed Acoustic Sensing
Optical fibers are widely known in their ability to transfer huge amounts of data efficiently and cost-effectively. As the backbone of our communications networks, optical fibers are everywhere: underground or aerial in our streets, underwater in the oceans, along highways, railways, pipelines, power lines and fences, in campuses and in data centers. Optical fibers are […] Read More >
Hardware Accelerators for Data Structures
We developed the first parallel architecture for a dynamic data-structure for approximate membership (i.e., a Bloom filter that also supports deletions). UNMET NEEDThe filter architecture supports multiple operations per cycle while preserving sequential order with a fixed and stable throughput that does not depend on the type of operations, the workload, or how populated the […] Read More >
Direction of Arrival Deception Using Metasurfaces
The invention of radars was soon followed by extensive research and development of counter measures, the most well-known being the invention of stealth technology. By employing special geometric designs and carefully selected materials, a reduction of the target’s radar cross section and the resulting backscattered energy was successfully achieved, substantially reducing distances between the radar […] Read More >
